S
M
T
W
T
F
S
30
67°
50°
31
68°
52°
1
67°
53°
2
68°
51°
3
68°
49°
4
66°
51°
5
67°
53°
6
67°
49°
7
69°
51°
8
67°
51°
9
69°
50°
10
70°
49°
11
66°
52°
12
67°
47°
13
69°
51°
14
69°
50°
15
68°
45°
16
64°
47°
17
66°
45°
18
67°
48°
19
67°
51°
20
68°
51°
21
68°
50°
22
67°
50°
23
65°
48°
24
66°
49°
25
65°
49°
26
64°
48°
27
66°
49°
28
64°
48°
29
66°
46°
30
64°
46°
1
Hist. Avg.
60°
48°
2
Hist. Avg.
60°
48°
3
Hist. Avg.
60°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sonning
Sonning's September 2026 forecast shows daily high temperatures ranging from 64° to 70°, with overnight lows between 45° and 53°. The average high for September is 67° with an average low of 49°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Sonning. See also: October | November | December.